A FIVE-LEVEL VOLTMETER

FIVE-LEVEL VOLTMETERChange arrow indicators the dog often come led. And this is not surprising: the second is much easier and safer first. Simple five-level scheme of the AF voltmeter to the voltage of 0.1—0.6 volts, where the indicators are LEDs, published in the journal “Рипката1ег” (GDR). If the signal fed into socket x2, XS, the voltage exceeds 0.1 V, open transistors V2, V4 and, as a result, the led turns on Q1. With an increase of the signal to 0.2 In open semiconductor triode V6 and the led flashes B2. When the signal voltage reaches about 0.6 V, burn all the LEDs.

LEDs usually have a vertical “column,” much like a thermometer. Increasing the voltage increases the height of a shining pillar, clearly showing the signal level.
 
To a low-power device, the voltmeter is connected through a matching emitter cascade V1 signal on socket X1.
 
In the voltmeter instead of overseas semiconductor devices can be applied domestic: transistors КТ306, КТ312 or KT315, diodes Д219, Д220, LEDs АЛ102А — АЛ102Г, choosing the resistance of resistors R3, R5, R7, R9, R11.
 
FIVE-LEVEL VOLTMETER

Recommend to read

  • IN THE EVENT OF CIRCUITIN THE EVENT OF CIRCUIT
    As you know, galvanic elements, batteries, accumulators and many generators do not have high-efficient, fast trigger protection against short circuits (a short circuit). No its in most...
  • ON THE RACK — TOOLSON THE RACK — TOOLS
    To various wall mounted devices for tool storage, add two more. The first metal (for example dural) channel. One of his ass he attached to the wall; the other Windows are cut into sawn...